Laan, H. L., van der.
The Sierra Leone diamonds : an economic study covering the years 1952-1961 / [by] H. L. Van der Laan. - London : Oxford University Press, 1965. - 234 P. : illus., maps. ; 22 cm.
Includes index and bibliographycal references
Diamond mines and mining--Sierra Leone.
Diamonds.
338.2782 / VAS
The Sierra Leone diamonds : an economic study covering the years 1952-1961 / [by] H. L. Van der Laan. - London : Oxford University Press, 1965. - 234 P. : illus., maps. ; 22 cm.
Includes index and bibliographycal references
Diamond mines and mining--Sierra Leone.
Diamonds.
338.2782 / VAS